One day, 3 drivers with their lorry stopped at a checkpost to pass the weight limit check.

The officer in charge presents them with a riddle and if they answer correctly within the first 2 attempts,

they will be allowed to pass through with no penalties even if they are over the weight limit.

The Officer hands each of them a notice showing their weight difference with that of the weight limit, down to the nearest Kilogram.

Officer: "Funnily enough, the numbers I gave you are consecutive, and if I add up the difference between each of your

load and the limit, and to that I subtract the multiplication of those same numbers, I get zero."

"My question is: can you guess which other two numbers are in your friend's hands?"

Using their first attempt, the three drivers answer at the same time:

"Yes", "No" and "No".

Can you save them all a potential penalty fee and use their last attempt to guess the numbers ?

## Penalty fee

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